Вправи 201 - 300 » 217 (6-12)

6) 3/y : 3y = 3/y : 3y/1 = 3/y • 1/3y = 3/(y •3y) = 1/y^2 ; 7) 5/〖2x〗^2 : x2 = 5/〖2x〗^2 : x^2/1 = 5/〖2x〗^2 • 1/x^2 = 5/(〖2x〗^2 • x^2 ) = 5/〖2x〗^4 ; 8) 6/b^2 : 3b2 = 6/b^2 : 〖3b〗^2/1 = 6/b^2 • 1/〖3b〗^2 = b/(b^2 • 〖3b〗^2 ) = 2/b^4 ; 9) 3y/7 : (–y) = 3y/7 : (–y/1) = 3y/7 • (–1/y) = –3y/(7 •y) = –3/7; 10) 〖24x〗^3/25 : (–4x) = 〖24x〗^3/25 : (–4x/1) = 〖24x〗^3/25 • (–1/4x) = –〖24x〗^3/(25 •4x) = –〖6x〗^2/25; 11) –6/7x : (–12x) = 6/7x : 12x/1 = 6/7x • 1/12x = 6/(7x •12x)= 1/〖14x〗^2 ; 12) –4y3 : 〖5y〗^2/16 = –〖4y〗^3/1 • 16/〖5y〗^2 = –(〖4y〗^3 •16)/〖5y〗^2 = –64y/5.